Axial Flux Coreless Technology

Background: Electric Machines Classification

Vs. brush using Stator windings Rotor magnets driver brushless brush

Vs. shape Disk-shaped Cylindrical

Vs. current-field directions Currents Magnetic field Torque Rotation axles Axial-Field Radial-Field

WE DEAL WITH AND OFFER: Brushless Axial field Disk-shaped

Why do we offer …

… Brushless ? No brushes – no maintenance No brushes – long working life No brushes – no sparking No brushes – reduced EMI / RFI

System with DISK-SHAPED system with CYLINDRICAL

… Axial Flux ? RADIAL FLUX AXIAL FLUX

Axial Flux Coreless Technology Detailing The Axial Flux Coreless Technology

Electromagnetic Structure

General Design

Stator Coils Carrying structure

Rotor Yoke Permanent magnets Carrying structure

of Axial-Flux Machines Additional Features of Axial-Flux Machines

Modularity - Example of 3-Module Structure

Principle Features and Advantages

Features Axial direction of magnetic flux and radial direction of electric currents Light-weight disk-shaped stator Absolutely no cogging No parasitic forces between rotor and stators Self-ventilation or forced cooling Very low inductance

Advantages No eddy-current losses Excellent power/weight, power/volume ratios Extremely high efficiency at high speeds Absolutely smooth rotation Excellent controllability Very low voltage drop under load in generators

Applications High- and medium speed alternators Direct drive for ultra-accurate position stages and rotary tables Drives for high speed motors with or without transmissions Spindles and flywheels

Implementations Generators and APU Diesel engine Controller Gasoline engine Generator Dual-input Converter Generator Charge controller Tactical automatic charger (24V, 1kW, 8 kg) MIL-standard EMI/RFI protected portable dual-Input diesel generator (28 VDC, 1.5 kW, 55 kg)

Implementations Liquid-cooled motors for heavy electric vehicle Gear - box Motor AT - 25 for EV (25 kW, 10,500 rpm, OD=260 mm) AT - 25 + gear-box 1:7.75 75 kW for EV

Implementations Air-cooled motors for light electric vehicle M300 (300 W 5,000 rpm 0.9 kg, OD=127 mm) M300 + worm gear (260 W 100 rpm)

(accuracy +/- 1”, runout 3um) Ultra accurate rotating optical bench Implementations Direct drive rotating stages Turntable RT -200 (accuracy +/- 1”, runout 3um) Ultra accurate rotating optical bench

Implementations Motor-reducer assembly Hub wheel-drive for robotics 3kg (50 Nm 50 rpm)

Motor Technology Estimation (1999, per VW) Trans flux Coreless Axial Flux TF- Motor Eisenloser Axialfluxmotor Efficiency Wirkungsgrad Switched Reluctance Motor PM-Synchron motor Asynchronmotor Status Serial production serienmäßig verfügbar Prototypes Prototypen vorhanden Design Phase Specific power 1 2 Leistungsgewicht [kW/kg]